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Recent questions tagged q8
Questions
If Shelly does not like John, what is the truth value of the statement "Shelly likes Mike and she likes John."?
jeemain
math
mathematical-reasoning
class11
ch14
easy
logical-operations-(and-or)
q8
asked
Jan 17, 2014
by
thanvigandhi_1
1
answer
Calculate the wave length of light radiation that would be emitted,when an electron in the fourth Bohr's orbit of $He^+$ ion falls to the second Bohr's orbit.To what transition does this light radiation correspond in the H-atom?
jeemain
chemistry
physical-chemistry
class11
unit2
atomic-structure
bhor's-model
q8
medium
asked
Jan 9, 2014
by
sreemathi.v
1
answer
Seven white balls and three black balls are randomly placed in a row. The probability that no two black balls are placed adjacently equals
jeemain
math
cbse
class12
probability
bionomial-distribution
difficult
q8
asked
Jan 8, 2014
by
thanvigandhi_1
2
answers
A die is thrown 4 times. The probability of getting at most two 6 is :
jeemain
math
cbse
class12
probability
medium
q8
asked
Jan 4, 2014
by
thanvigandhi_1
1
answer
In a throw of two coins, the probability of getting both heads or both tails is
jeemain
math
cbse
class12
probability
easy
q8
asked
Jan 2, 2014
by
thanvigandhi_1
1
answer
In an AP, the sum of n terms is $n^2+1$. Find the 16th term.
jeemain
math
class11
ch9
sequences-and-series
easy
arithmetic-progression
q8
asked
Dec 30, 2013
by
yamini.v
1
answer
If the lines $\large\frac{x-1}{2}=\frac{y+1}{k}=\frac{z}{2}$ and $\large\frac{x+1}{5}=\frac{y+1}{2}=\frac{z}{k}$ are co planar then the plane containing these two lines is?,
jeemain
math
class12
ch11
3d-geometry
coplanar-lines
difficult
q8
asked
Dec 25, 2013
by
rvidyagovindarajan_1
1
answer
Let $f(x)=x|x|$. The set of points where $f(x)$ is twice differentiable is
jeemain
math
class12
ch5
continuity-and-differentiability
differentiability
easy
q8
asked
Dec 20, 2013
by
sreemathi.v
1
answer
Three forces acting on a body are shown in the figure. To have the resultant force only along the $y$ - direction, the magnitude of the minimum additional force needed is :
aipmt
modelpaper
physics
2008
q8
asked
Dec 14, 2013
by
thanvigandhi_1
0
answers
Integrate: $\int \limits_0^{z/4} \sin ^4 (2x)dx $
jeemain
math
class12
ch7
integral-calculus
integration-by-subsitution
easy
q8
asked
Dec 12, 2013
by
meena.p
1
answer
The dimensions of a conductance cell are 0.15dm & 0.95dm and the electrodes are separated by 0.05dm. What is cell constant for this cell?
jeemain
chemistry
unit8
redox-reactions-and-electrochemistry
q8
easy
asked
Dec 10, 2013
by
sreemathi.v
1
answer
Identify the vector suitable to clone long fragments of DNA
jeemain
eamcet
biology
2002
q8
asked
Dec 6, 2013
by
thanvigandhi_1
0
answers
Which of the following is a false statement?
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
bond-parameters
q8
medium
asked
Dec 6, 2013
by
sreemathi.v
1
answer
Molecular orbital theory predicts the $F_2^{2+}$ ion has a bond order of
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
molecular-orbital-theory
q8
easy
asked
Dec 6, 2013
by
sreemathi.v
1
answer
Which of the following alkanes can be synthesized by Wurtz reaction in good yield?
jeemain
chemistry
unit21
organic-chemistry
q8
difficult
basic-organic-chemistry
class11
ch12
asked
Dec 4, 2013
by
sreemathi.v
1
answer
There are three common ways to convert an alkene into alcohol: a) acid catalysed hydration, b)hydroboration -oxidation and c)oxymercuration-demercuration. Which of the following statements about these reactions is correct?
jeemain
chemistry
unit21
organic-chemistry
q8
medium
basic-organic-chemistry
class11
ch12
asked
Dec 2, 2013
by
sreemathi.v
1
answer
Spirulina is an example of
jeemain
eamcet
biology
2001
q8
asked
Dec 1, 2013
by
thanvigandhi_1
0
answers
$NO$ belongs to which category?
jeemain
chemistry
unit15
p-block-elements
q8
easy
asked
Nov 26, 2013
by
sreemathi.v
1
answer
If $A=\begin{bmatrix}6&8&5\\4&2&3\\9&7&1\end{bmatrix}$ is the sum of symmetric matrix $B$ and skew-symmetric matrix $C$ then $B$ is
jeemain
math
class12
ch3
matrices
q8
symmetric-and-skew-symmetric-matrices
difficult
asked
Nov 25, 2013
by
sreemathi.v
1
answer
The unique anatomical character of cycas leaflet is in the presence of :
jeemain
eamcet
biology
2000
q8
asked
Nov 24, 2013
by
thanvigandhi_1
1
answer
Geitonogamy is found in
jeemain
eamcet
biology
1999
q8
asked
Nov 22, 2013
by
thanvigandhi_1
0
answers
If $a_1,a_2,a_3.....a_n$ are in G.P then the determinant $\Delta=\begin{vmatrix}\log a_n&\log a_{n+1}& \log a_{n+2}\\\log a_{n+3}&\log a_{n+4}&\log a_{n+5}\\\log a_{n+6}&\log a_{n+7}&\log a_{n+8}\end{vmatrix}$ is equal to
jeemain
math
class12
ch3
determinants
q8
evaluate-determinants
medium
asked
Nov 22, 2013
by
sreemathi.v
1
answer
The equilibrium constant for a reaction; $ A+B \rightleftharpoons C+D $ is $ 1 \times 10^{-2} $ at 298 K is 2 at 373 K. The chemical process resulting in the formation of C and D is
jeemain
chemistry
q8
aipmt
equilibrium
medium
biology
asked
Nov 13, 2013
by
mosymeow_1
1
answer
A thin uniform square lamina of side a is placed in the xy-plane with its sides parallel to x and y-axes and with its center coinciding with origin. Its moment of inertia about an axis passing through a point on the y-axis at a distance $y=2a$ and parallel to x-axis is equal to its moment of inertia about an axis passing through a point on the x-axis at a distance $x=d$ and perpendicular to xy-plane. Then value of d is :
jeemain
eamcet
physics
2004
q8
asked
Nov 13, 2013
by
meena.p
1
answer
If $(1+x)^{15}=a_0 +a_1 x +.....+ a_{15} x^{15},$ then $\sum \limits_{r=1}^{15} r \large\frac{a_r}{a_{r_1}}$ is equal to :
jeemain
eamcet
math
2005
q8
asked
Nov 11, 2013
by
meena.p
1
answer
The ratio of components of male flower of Smilax, female flower of Ruscus, modified reproductive shoots of Scilla and Tephrosia is :
jeemain
eamcet
biology
2010
q8
asked
Nov 10, 2013
by
thanvigandhi_1
1
answer
Which of the following is an example for heterogeneous catalysis reaction?
jeemain
eamcet
chemistry
2005
q8
asked
Nov 8, 2013
by
meena.p
1
answer
The minimum force required to move a body up an inclined plane is three times the minimum force required to prevent it from sliding down the plane. If the coefficient of friction between the body and the inclined plane is $\large\frac{1}{2 \sqrt 3},$ the angle of the inclined plane is :
jeemain
eamcet
physics
2005
q8
asked
Nov 7, 2013
by
meena.p
1
answer
$8.0575\times 10^{-2}kg$ of Glauber's salt is dissolved in water.Obtain $1clm^3$ of a solution of density $1077.2kgm^{-3}$.Calculate the molarity and the mole fraction of $Na_2SO_4$ in solution .
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q8
difficult
asked
Nov 6, 2013
by
sreemathi.v
1
answer
The number of natural numbers less than 1000, in which no two digits are repeated , is :
jeemain
eamcet
math
2006
q8
asked
Nov 5, 2013
by
meena.p
1
answer
The points with position vectors $60\hat i+3\hat j,\:70\hat i-8\hat j\:and\:a\hat i-52\hat j$ are collinear if $a=?$
jeemain
math
class12
ch10
vector-algebra
easy
vector-product
q8
asked
Oct 29, 2013
by
rvidyagovindarajan_1
1
answer
Which of the following regents when heated with ethyl chloride, forms ethylene?
jeemain
eamcet
chemistry
2006
q8
asked
Oct 29, 2013
by
meena.p
1
answer
When the angle of inclination of an inclined plane is 0, an object slides down with uniform velocity. If the same object is pushed with a initial velocity u on the same inclined plane; it goes up the plane and stops at a certain distance on the plane. Thereafter the body:
jeemain
eamcet
physics
2006
q8
asked
Oct 28, 2013
by
meena.p
1
answer
If 8 molecules of Ribulose 1, 5-bisphosphate molecules are oxygenated by RUBISCO, how many PGA molecules are ultimately available to PCR cycle in photosynthetic carbon oxidation cycle?
jeemain
eamcet
biology
2011
q8
asked
Oct 25, 2013
by
thanvigandhi_1
1
answer
If a polygon of n sides has 275 diagonals, then n is equal to
jeemain
eamcet
math
2007
q8
asked
Oct 24, 2013
by
meena.p
1
answer
An oxide of an element is a gas and dissolves in water to give an acidic solution. The element belongs to
jeemain
eamcet
chemistry
2007
q8
asked
Oct 23, 2013
by
meena.p
1
answer
How many electrons are present in 1.6g of methane?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q8
medium
asked
Oct 23, 2013
by
sreemathi.v
1
answer
A man slides down on a telegraphic pole with an acceleration equal to one-fourth of acceleration due to gravity. The frictional force between man and pole is equal to in terms of man's weight w
jeemain
eamcet
physics
2007
q8
asked
Oct 22, 2013
by
meena.p
1
answer
Which of the following alkanes has 75% of carbon?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
q8
easy
asked
Oct 22, 2013
by
sreemathi.v
1
answer
If $\sin\alpha+\sin\beta=a,\cos\alpha+\cos\beta=b$ then $\cos(\alpha+\beta)$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q8
trignometric-equations
difficult
asked
Oct 18, 2013
by
sreemathi.v
1
answer
If $^n P_r=30240$ and $^n C_r=252$ then the ordered pair (n,r)=
jeemain
eamcet
math
2008
q8
asked
Oct 16, 2013
by
meena.p
1
answer
Study the following lists
jeemain
eamcet
biology
2012
q8
asked
Oct 15, 2013
by
thanvigandhi_1
1
answer
The value of $\sqrt{\large\frac{1+\cos\theta}{1-\cos\theta}}$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q8
trignometric-equations
medium
asked
Oct 14, 2013
by
sreemathi.v
1
answer
If x is numerically so small so that $x^2$ and higher powers of x can be neglected, then $\bigg(1+ \large\frac{2x}{3}\bigg)^{\large\frac{3}{2}}$$.(32+5x)^{\large\frac{-1}{5}}$ is approximately equal to :
jeemain
eamcet
math
2009
q8
asked
Oct 8, 2013
by
meena.p
1
answer
If $\theta=\large\frac{\pi}{2^n+1}$ then $\cos \theta\cos 2\theta\cos 2^2\theta......\cos2^{n-1}\theta$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q8
basic-trigonometric-functions
easy
asked
Oct 4, 2013
by
sreemathi.v
1
answer
A metal plate of cross-sectional area rests on a layer of caster oil $(\eta= 15.5 p) \;0.2\;cm$ thick. Calculate the horizontal force required to move the plate with a speed of $3 cm/s$
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q8
medium
asked
Oct 3, 2013
by
meena.p
1
answer
Entry of pollen tube into the ovule through chalaza was discovered by Treub in a Xerophyte. This plant is associated with a pair of characters given below
jeemain
eamcet
biology
2013
q8
asked
Oct 2, 2013
by
thanvigandhi_1
1
answer
For $| x | < \large\frac{1}{5}$, the coefficient of $x^3$ in the expansion of $\large\frac{1}{(1-5x)(1-4x)}$ is :
jeemain
eamcet
math
2010
q8
asked
Sep 26, 2013
by
meena.p
1
answer
If the distance travelled by a particle in time $t$ is given by $s=t^2-2t+5$ then its acceleration is
jeemain
eamcet
math
2011
q8
asked
Sep 20, 2013
by
meena.p
1
answer
If $x$ is small so that $x^2$ and higher powers can be neglected, then the approximate value for $\large\frac{(1-2x)^{-1}(1-3x)^{-2}}{(1-4x)^{-3}}$ is :
jeemain
eamcet
math
2013
q8
asked
Sep 13, 2013
by
meena.p
1
answer
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